GB1346348A - Watch or clock cover glass including a liquid crystal display device - Google Patents

Watch or clock cover glass including a liquid crystal display device

Info

Publication number
GB1346348A
GB1346348A GB3374471A GB3374471A GB1346348A GB 1346348 A GB1346348 A GB 1346348A GB 3374471 A GB3374471 A GB 3374471A GB 3374471 A GB3374471 A GB 3374471A GB 1346348 A GB1346348 A GB 1346348A
Authority
GB
United Kingdom
Prior art keywords
glass
electrode
layer
liquid crystal
electrodes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3374471A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Longines Watch Co Francillon Ltd
Original Assignee
Compagnie des Montres Longines Francillon SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie des Montres Longines Francillon SA filed Critical Compagnie des Montres Longines Francillon SA
Publication of GB1346348A publication Critical patent/GB1346348A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B39/00—Watch crystals; Fastening or sealing of crystals; Clock glasses
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/30—Illumination of dials or hands
    • G04B19/32—Illumination of dials or hands by luminescent substances
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G9/00—Visual time or date indication means
    • G04G9/0023—Visual time or date indication means by light valves in general
    • G04G9/0029—Details
    • G04G9/0035—Details constructional
    • G04G9/0041—Illumination devices
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133616—Front illuminating devices

Abstract

1346348 Timepiece glass COMPAGNIE DES MONTRES LONGINES FRANCILLON S A 19 July 1971 [16 Sept 1970] 33744/71 Heading G3T A timepiece cover glass utilizes a liquid crystal 3, with electrodes 2, 5, between a support 1 and a glass 4, which has a layer 6 of light absorbing material and a layer 7 of luminescent material upon its surface. Incident light, which is directed through transparent electrodes 5 by refracting surfaces 8 on the glass, and is reflected by electrode 2 acting as a mirror, is absorbed by layer 6, providing a dark background. Electrodes 5 which are in the form of indicia, when activated, cause the crystal 3 near the electrode to become translucent, thus dispersing the light, indicating the time against the dark background. The outer portions 2', 3' of electrode 2 and crystal 3 may be inclined as shown, or/and the glass 4 may have parallel faces with layers 6, 7 upon an upper roughened surface, the glass having an annular bevelled surface forming a stepped prism or Fresnel lens.
GB3374471A 1970-09-16 1971-07-19 Watch or clock cover glass including a liquid crystal display device Expired GB1346348A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1370870A CH534916A (en) 1970-09-16 1970-09-16 Liquid crystal display device for watchmaking

Publications (1)

Publication Number Publication Date
GB1346348A true GB1346348A (en) 1974-02-06

Family

ID=4394666

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3374471A Expired GB1346348A (en) 1970-09-16 1971-07-19 Watch or clock cover glass including a liquid crystal display device

Country Status (5)

Country Link
US (1) US3768887A (en)
CH (2) CH534916A (en)
DE (1) DE2138063C3 (en)
FR (1) FR2106550B1 (en)
GB (1) GB1346348A (en)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992081A (en) * 1969-06-11 1976-11-16 Kabushiki Kaisha Suwa Seikosha Liquid crystal display device with enhanged contrast
US4033672A (en) * 1971-11-24 1977-07-05 Ing. C. Olivetti & C., S.P.A. Ufficio Brevetti Liquid crystal devices
US3947091A (en) * 1974-09-19 1976-03-30 Rockwell International Corporation Reflective display apparatus
DE2640909A1 (en) * 1976-09-10 1978-03-23 Siemens Ag Passive light amplification in electro-optic display - uses filter plate located behind fluorescent plate for ambient light amplification (SW 27.6.77)
DE2616669C2 (en) * 1976-04-15 1986-10-09 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Radiation collector and compressor in the form of a fluorescent plastic plate and display device herewith
US4043116A (en) * 1976-01-29 1977-08-23 Metallprodukte A.G. Grenchen Timepiece comprising a flat display device exposed through an opening in a case
CH609193B5 (en) * 1976-02-25 1979-08-31 Ebauches Sa Passive electro-optical display cell and method for its manufacture
DE2660996C2 (en) * 1976-04-15 1986-08-28 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Display device with a radiation collector and condenser
US4124279A (en) * 1977-07-18 1978-11-07 Hughes Aircraft Company Reflector focused light trap for a liquid crystal display
US4263594A (en) * 1978-06-19 1981-04-21 Izon Corporation Electro-optical display design
JPS59120983A (en) * 1982-12-28 1984-07-12 Matsushita Electric Works Ltd Solar battery clock
US5329502A (en) * 1993-12-10 1994-07-12 Haring Chad T Light bending watch apparatus
GB0028890D0 (en) * 2000-11-27 2001-01-10 Isis Innovation Visual display screen arrangement
GB0223883D0 (en) * 2002-10-15 2002-11-20 Seamless Display Ltd Visual display screen arrangement
WO2009122691A1 (en) * 2008-03-31 2009-10-08 シャープ株式会社 Display device

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH232944A (en) * 1943-04-05 1944-06-30 Desfourneaux Eugene Watch with so-called "radium" lighting.
GB774577A (en) * 1952-11-07 1957-05-15 British Thomson Houston Co Ltd Improvements relating to the illumination of instrument dials
US2847970A (en) * 1955-02-16 1958-08-19 Thomas A Smith Transilluminated dial
CH346178A (en) * 1958-04-18 1960-04-30 Kyburz & Cie Glass to cover the dial of an indicating instrument
US3499112A (en) * 1967-03-31 1970-03-03 Rca Corp Electro-optical device

Also Published As

Publication number Publication date
DE2138063B2 (en) 1972-11-23
CH1370870A4 (en) 1972-10-13
FR2106550A1 (en) 1972-05-05
US3768887A (en) 1973-10-30
FR2106550B1 (en) 1974-09-06
CH534916A (en) 1972-10-13
DE2138063A1 (en) 1972-03-23
DE2138063C3 (en) 1978-12-07

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee